Brides Cake auto, Day 14. Room temp 81f day/75f night, humidity 37-45%(and struggling to even maintain that), pH has been 6.0-6.4/run off 5.8-6.2, fox farm line at 70%. Six plants total this is the only one with this issue.
What I've done:
Raised lights; all plants were preying by that evening, so I put back where it was.
Moved plant further from fan, which barely blowing to begin with. Maybe wall deflection adding to that one.
Coco/perilite wetness is minimal, after water/feed the medium by next day halfway down shows dry on saturation meter.